能源化学(英文版)

能源化学(英文版) ›› 2020, Vol. 44 ›› Issue (5): 41-50.DOI: 10.1016/j.jechem.2019.09.014

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Tailored PEDOT:PSS hole transport layer for higher performance in perovskite solar cells: Enhancement of electrical and optical properties with improved morphology

Khan Mamun Rezaa, Ashim Gurunga, Behzad Bahramia, Sally Mabrouka, Hytham Elbohyb, Rajesh Pathaka, Ke Chena, Ashraful Haider Chowdhurya, Md Tawabur Rahmana, Steven Letourneauc, Hao-Cheng Yangd, Gopalan Saianande, Jeffrey W. Elamc, Seth B. Darlingf,g,h, Qiquan Qiaoa   

  1. a Department of Electrical Engineering, Center for Advanced Photovoltaics, South Dakota State University, Brookings 57007, SD, USA;
    b Physics Department, Damietta University, New Damietta 34517, Egypt;
    c Applied Materials Division, Argonne National Laboratory, Argonne 60439, IL, USA;
    d Center for Nanoscale Materials, Argonne National Laboratory, Argonne 60439, IL, USA;
    e Global Innovative Centre for Advanced Nanomaterials, Faculty of Engineering and Built Environment, The University of Newcastle, Callaghan 2308, New; South Wales, Australia;
    f Chemical Sciences and Engineering Division, Argonne National Laboratory, Lemont 60439, IL, USA;
    g Institute for Molecular Engineering, Argonne National Laboratory, Lemont 60439, IL, USA;
    h Institute for Molecular Engineering, University of Chicago, Chicago 60637, IL, USA
  • 收稿日期:2019-07-01 修回日期:2019-09-04 出版日期:2020-05-15 发布日期:2020-12-18
  • 基金资助:
    This work was supported by NSF MRI (1428992), NASA EPSCoR (NNX15AM83A), U.S. - Egypt Science and Technology (S&T) Joint Fund, SDBoR R&D Program and EDA University Center Program (ED18DEN3030025). This work is derived from the Subject Data supported in whole or part by NAS and USAID, and any opinions, findings, conclusions, or recommendations expressed in the paper are those of the authors alone, and do not necessarily reflect the views of USAID or NAS. This work was also performed, in part, at the Center for Nanoscale Materials, a U.S. Department of Energy Office of Science User Facility, and supported by the U.S. Department of Energy, Office of Science, under Contract No. DE-AC02-06CH11357.

Tailored PEDOT:PSS hole transport layer for higher performance in perovskite solar cells: Enhancement of electrical and optical properties with improved morphology

Khan Mamun Rezaa, Ashim Gurunga, Behzad Bahramia, Sally Mabrouka, Hytham Elbohyb, Rajesh Pathaka, Ke Chena, Ashraful Haider Chowdhurya, Md Tawabur Rahmana, Steven Letourneauc, Hao-Cheng Yangd, Gopalan Saianande, Jeffrey W. Elamc, Seth B. Darlingf,g,h, Qiquan Qiaoa   

  1. a Department of Electrical Engineering, Center for Advanced Photovoltaics, South Dakota State University, Brookings 57007, SD, USA;
    b Physics Department, Damietta University, New Damietta 34517, Egypt;
    c Applied Materials Division, Argonne National Laboratory, Argonne 60439, IL, USA;
    d Center for Nanoscale Materials, Argonne National Laboratory, Argonne 60439, IL, USA;
    e Global Innovative Centre for Advanced Nanomaterials, Faculty of Engineering and Built Environment, The University of Newcastle, Callaghan 2308, New; South Wales, Australia;
    f Chemical Sciences and Engineering Division, Argonne National Laboratory, Lemont 60439, IL, USA;
    g Institute for Molecular Engineering, Argonne National Laboratory, Lemont 60439, IL, USA;
    h Institute for Molecular Engineering, University of Chicago, Chicago 60637, IL, USA
  • Received:2019-07-01 Revised:2019-09-04 Online:2020-05-15 Published:2020-12-18
  • Contact: Qiquan Qiao
  • Supported by:
    This work was supported by NSF MRI (1428992), NASA EPSCoR (NNX15AM83A), U.S. - Egypt Science and Technology (S&T) Joint Fund, SDBoR R&D Program and EDA University Center Program (ED18DEN3030025). This work is derived from the Subject Data supported in whole or part by NAS and USAID, and any opinions, findings, conclusions, or recommendations expressed in the paper are those of the authors alone, and do not necessarily reflect the views of USAID or NAS. This work was also performed, in part, at the Center for Nanoscale Materials, a U.S. Department of Energy Office of Science User Facility, and supported by the U.S. Department of Energy, Office of Science, under Contract No. DE-AC02-06CH11357.

摘要： Precise control over the charge carrier dynamics throughout the device can result in outstanding performance of perovskite solar cells (PSCs). Poly(3,4-ethylenedioxythiophene):poly(styrene sulfonate) (PEDOT:PSS) is the most actively studied hole transport material in p-i-n structured PSCs. However, charge transport in the PEDOT:PSS is limited and inefficient because of its low conductivity with the presence of the weak ionic conductor PSS. In addition, morphology of the underlying PEDOT:PSS layer in PSCs plays a crucial role in determining the optoelectronic quality of the active perovskite absorber layer. This work is focused on realization of a non-wetting conductive surface of hole transport layer suitable for the growth of larger perovskite crystalline domains. This is accomplished by employing a facile solventengineered (ethylene glycol and methanol) approach resulting in removal of the predominant PSS in PEDOT:PSS. The consequence of acquiring larger perovskite crystalline domains was observed in the charge carrier dynamics studies, with the achievement of higher charge carrier lifetime, lower charge transport time and lower transfer impedance in the solvent-engineered PEDOT:PSS-based PSCs. Use of this solventengineered treatment for the fabrication of MAPbI3 PSCs greatly increased the device stability witnessing a power conversion efficiency of 18.18%, which corresponds to ～37% improvement compared to the untreated PEDOT:PSS based devices.

关键词: Perovskite solar cells, PEDOT:PSS treatment, Hole transport layer, Non-wetting, PEDOT:PSS surface

Abstract: Precise control over the charge carrier dynamics throughout the device can result in outstanding performance of perovskite solar cells (PSCs). Poly(3,4-ethylenedioxythiophene):poly(styrene sulfonate) (PEDOT:PSS) is the most actively studied hole transport material in p-i-n structured PSCs. However, charge transport in the PEDOT:PSS is limited and inefficient because of its low conductivity with the presence of the weak ionic conductor PSS. In addition, morphology of the underlying PEDOT:PSS layer in PSCs plays a crucial role in determining the optoelectronic quality of the active perovskite absorber layer. This work is focused on realization of a non-wetting conductive surface of hole transport layer suitable for the growth of larger perovskite crystalline domains. This is accomplished by employing a facile solventengineered (ethylene glycol and methanol) approach resulting in removal of the predominant PSS in PEDOT:PSS. The consequence of acquiring larger perovskite crystalline domains was observed in the charge carrier dynamics studies, with the achievement of higher charge carrier lifetime, lower charge transport time and lower transfer impedance in the solvent-engineered PEDOT:PSS-based PSCs. Use of this solventengineered treatment for the fabrication of MAPbI3 PSCs greatly increased the device stability witnessing a power conversion efficiency of 18.18%, which corresponds to ～37% improvement compared to the untreated PEDOT:PSS based devices.

Key words: Perovskite solar cells, PEDOT:PSS treatment, Hole transport layer, Non-wetting, PEDOT:PSS surface